/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/XRMotionControllerBase.h
This class adapts deprecated or maintenence only xr plugins which use the old EControllerHand motion sources to the newerFNameMotionSource API. If a plugin is still in active development it should refactor and derive fromIMotionControllerorFXRMotionControllerBaserather than derive from this class.
class FXRMotionControllerBaseLegacy : public [FXRMotionControllerBase](API\Plugins\XRBase\FXRMotionControllerBase)